Michael J. Fox Rocks Out with The Who!

[Brian Damage]

"This is almost worth getting Parkinson's for!" Michael J. Fox declared as he took the stage to play guitar with The Who in New York City Wednesday night.

The actor – who was diagnosed with Parkinson's disease in 1991 – rocked out to the legendary band's "Magic Bus," trading licks and windmill guitar riffs with Pete Townshend.

The once-in-a-lifetime performance was the grand finale of Fox's annual A Funny Thing Happened On The Way To Cure Parkinson's.

Ryan Reynolds – who recently ran the New York City Marathon in honor of his father, who suffers from Parkinson's – also attended the star-studded event, along with his new wife Scarlett Johansson. Also on the guest list: Rachael Ray, Julianne Moore, and New York Yankee Derek Jeter.

The event was even more celebratory than usual, thanks to Barack Obama's presidential win the night before.

"I'm positive that one of the first things that [Obama] is going to do ... is revisit the [George W. Bush's] ban on stem cell research ...," Fox told PEOPLE at the event, which he attended along with wife Tracy Pollen and daughters, Schuyler and Aquinnah. "I'm really excited."

http://www.people.com/people/article...238554,00.html